Seite - 138 - in Adaptive and Intelligent Temperature Control of Microwave Heating Systems with Multiple Sources

5. ExperimentalResults of heating sources. The verification results can be found in fi gures 5.6 and 5.7. Since the transient heating rates are more relevant to the prac- tical applications, only results about the short time heating patterns (t = 2 s) are demonstrated and analyzed in the following. (a)Trial1at time t=2s (b)Trial2at time t=2s (c)Trial3at time t=2s 1 2 3 4 50 .0 0 .2 0 .4 0 .6 0 .8 1 .0 1 .2 I n d e x o f m e a s u r e d p o i n t s T r i a l 1 T r i a l 2 T r i a l 3 (d)Heatingratesof3 trials. Figure5.6. Heating patterns (a, b, c) and rates (d) of source No. 1 and 5 at 3 different trials. The results in figures 5.6 and 5.7 both indicate that even multiple heating sources are switched on simultaneously, the corresponding superposed heating patterns are still stable. Meanwhile, the number 138